Water-tube boiler.



No. s4|,o95. Patented 1an. 9, |900. T. FRENCH. WATER TUBE BDILER.

(Application filed July 6, 1899.)

2 Sheets-Sheet I.

(No Model.)

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No. 641,095. Patented Jan. 9, |9001'. T. FRENCH.

WATER TUBE BUILER.

(Application filed. July 8, 1899.)

2 Sheets-$heet 2.

(No Modal.)

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TOM FRENCH, OF ANDOVER, MAINE.

WATER-TUBE BolLER.

SPECIFICATION forming' part Of Letters Patent N0. 641,095, dated. January 9, 1900.

Application filed J'uly 6,1899. Serial No. 722,951. (No model.)

To all whom t may concern:

Be it known that I, TOM FRENCH, of Andover, in the, county of Oxford and State of Maine, have invented a new and Improved Water-Tube Boiler, of which the followingis a full, clear, and exact description.

The object of the invention is to provide a new and improved water-tube boiler which is simple, durable, and compact in construction, very effective in operation, having ashort and eii'ective circulation of the water, and arranged to quickly and thoroughly separate the steam and water to insure the generation of very dry steam.

parts and combinations of the same, as will .be fully described hereinafter and then pointed out in the claims.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding part-s in both views.

Figure l is a cross-section of the improvement on the line 1 1 in Fig. 2, and Fig. 2 is a longitudinal sectional elevation of the same on the line 2 2 in Fig. 1.

The improved water-tube boiler is provided with a shell A, open at the bottom and having sides and ends and a top or roof, from which leads a smoke-stack B. The sides of the shell A are provided with doors A' for giving access to the interior of the shell for cleaning purposes, and in the ends of the shell are arranged doors A2 for giving access to the firebox.

In the shell A, at the bottom thereof, are arranged spaced longitudinally-extending muddrums C O', connected with each other at their ends by transverse connecting-pipes D D', somewhat less in diameter than the drums C C', to cause the mud to principally settle in the drums C C. From the tops of the muddrums O O lead sets of Water circulating pipes E E to connect with the upper ends of spaced longitudinally-extending steam-drums Fand F, respectively, located a suitable distance above the mud-drums O O', as is plainly 4shown in the drawings.

The invention consists of novel features and allel with one another, as is plainly shown in Fig. 1, with the groups of the sets of Water circulating pipes E E' alternating, said groups of pipes being close together at the point of crossing, so as to form a solid roof for the y pipes G G', and pipes G2 connect the ends of the steam-drum F with the ends of the muddrum C, and like pipes G3 connect the ends of the mud-drum C' at the junction of the pipes D G and D G'.

From the tops of the steam-drums F vF lead y steam-pipes II H into the sides of a superheating-dome I, having an outlet-pipe I' at one end for conducting the steam to the boiler ends of the steam-dome I connect near the -or other place where it is to be used. The

bottom by pipes J J' with the transverse con'-V necting-pipes D D for the muddrums O O'.V

The steam-dome I is located directly under the roof of the shell A and somewhat above and midway between the steam-drums F F', Y

so that the steam from the steam-drums can readily pass by the pipes H II into the steamdome and any water carried by the steam into the said dome can readily ow back from the latter by the pipes .I J' to the connectingpipes D D' to renter the water circulation.

. Opposite the entrance-openings of the pipes E E' within the steam-drums F F' are arranged baiile-plates K K', respectively, for deiiecting entering steam and' water in a downward direction in said drums, and similar baffle-plates K2 and K3 are arranged in said drums opposite the openings of the pipes H II', so that as little water as possible is carried by the steam from the drums F F' to the dome I. The latter is also provided with baffle-plates K4 K5 opposite the entrance-openings of the pipes H H to deflect the steam and water carried thereby, so that the water readily passes to the bottom of the dome and then returns by the pipes J J to the water circulation, as above explained. Sets of wa- IOS i ter-circulating pipes L L rise from the muddrum-connecting pipes D D to then extend longitudinally under the sets of pipes E E at the crossing thereof, the ends of the pipes L then extending upward to connect with the connecting-pipe G and the ends of the pipes L extending upwardly to connect with the connecting-pipe G.

A feed-water pipe is arranged in a coil N, extending over the steam-drums F F', the ends of said pipe leading to one of the connecting-pipes for the mud-drums, as shown in the drawings thepipe D'.

In order to prevent the smoke and gases rising from the fuel in the fire-box from passing directly up into the smoke-stack B and to cause the smoke and gases to circulate more thoroughly within the shell and the parts contained therein to insure a complete utilization ofthe units of heat, I provide the sides of the shell A with longitudinally-extending deflecting-plates O, projecting inwardly to the junction of the pipes E, the pipes E being at about the middle of the crossing of said pipes E, as is plainly shown in Fig. l. The smoke and gases rising from the fuel cannot pass up between the sets of water-circulating pipes at the crossings, as the same are very close together, plates P being preferably arranged between adjacent sets of pipes, and consequently the smoke and gases travel sidewise, finally striking the under side of the deflecting-plates O, which cause the smoke and gases to turn downward and then upward into the space between the pipes E and E and to then rise around the steam-drums F F to the roof or top of the shell A, to be again deflected by longitudinal deiecting-plates Q, leading from the roof of the shell to the sides of the steam-dome I.

Thus the smoke and'gases can pass only into t the space between the deflectng-plates and the top of the steam-dome from the ends of the latter, to then nally pass to the smokestack B and out to the air.

From the foregoing it is evident that a very large heating-surface is provided to insure a quick generation of the steam, especially as the circulation of the water from the muddrums to the steam-drums is comparatively quick, and the heat from the fuel in the firebox is caused to circulate in the shell to give off its heat before it finally passes to the smoke-stack, as above described.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A boiler comprising spaced mud-drums, spaced steam-drums above the mud-drums, and sets of transverse water-circulating pipes, each set leading from a mud-drum on one side to the steam-drum on the opposite side, the pipes of the sets alternating and arranged close together at their point of crossing to form a solid roof for the fire-box, substantially as shown and described.

2. A boilercomprising spaced and connected mud-drums, spaced and connected steamdrums above the mud-drums, and sets of transverse water-circulating pipes, each set leading from a mud-drum on one side to the steam-drum on the opposite side, the sets of water-circulating pipes being alternately arranged and passing each other above the longitudinal plane of the mud-drums and below that of the steam-drums, the said pipes being close together at their point of crossing, substantially as shown and described.

3. A boiler comprising spaced and connected mud-drums, spaced and connected steamdrums above the mud-drums, sets of transverse water-circulating pipes, each set leading from a mud-drum on one side to the steamdrum on the opposite side, the-sets of Watercirculating pipes passing each other above the longitudinal plane of the mud-drums and below that of the steam-drums and arranged close together at the point of crossing, to form the roof for the fire-box, and deiiecting-plates extending from the sets of pipes to the walls of the shell, substantially as shown and described.

4. A boiler comprising spaced and connected mud-drums, spaced and connected steamdrums above the mud-drums, sets of transverse Water-circulating pipes, each set leading from a mud-drum on one side to the steamdrum on the opposite side, the sets of watercirculating pipes passing each other above the longitudinal plane of the mud-dru ms and below that of the steam-drums, the sets of pipes leading from the tops of the mud-drums and entering the steam-drums near the top thereof, and battle-plates on the inside of the steamdrums opposite the" entrance ends of the Water-circulating pipes, substantially as shown and described.

5. A boiler comprising spaced and connected mud-drums, spaced and connectedsteamdrums above the mnd-drums, sets of transverse water-circulatin g pipes, each set leading from a mud-drum on one side to the steamdrum on the opposite side, the sets of Watercirculating pipes passing each other above the longitudinal plane of the mud-drums and below that of the steam-drums, the sets'of pipes leading from the tops of the mud-drums l side to the opposite steam-drum on the opposite side, connecting-pipes for connecting the IOO IIO

`ends of the mud-drums with each other, a

superheated steam-dome, steam-pipes for connecting the said steam-drums with the said dome, and return Water-pipes leading from the said steam-dome to the said connecting-pipes, substantially as shown and described.

7. A boiler comprising spaced muddru1ns, spaced steam-drums above the mud-drums, sets of transverse water-circulating pipes, each set leading from a muddrum on one side to the opposite steam-drum on the opposite side, the sets of water-circulating pipes passing each other above the longitudinal plane of the mud-drums and below that of the steam-drums, to form the roof for the fire-box, and transverse separating-plates between the sets of pipes at their' crossing, substantially as shown and described.

8. A boiler comprising spaced mud-drums, spaced steam-drums above the mud-drums, sets of transverse Water-circulating pipes, each set leading from a mud-drum on one side to the opposite steam-drum on the opposite side, the sets of water-circulating pipes passing each other above the longitudinal plane of the mud-drums and below that of the steam-drums, to form the roof for the iire-box, transverse separating-plates between the sets of pipes at their crossing, a shell, and longitudinal deilecting-plates at the sides of the shell at the beginning of the crossing of the circulating-Water pipes, substantially as shown and described.

9. A boiler comprising spaced mnd-drums, spaced steam-drums above the mud-drums, sets of transverse Water-circulating pipes, each set leading from a mud-drum on one side to the opposite steam-drum on the opposite side, connecting-pipes for connecting the ends of the mud-drums with each other, a superheated steam-dome, steam-pipes for connecting the said steam-drums with the said dome, return Water-pipes leading from the said steam-dome to the said connectingpipes, and feed-water pipes above the steamdrums and leading to the said connectingpipes, substantially as shown and described.

10. A boiler comprising spaced drums, spaced steam-drums above the mud-drums, sets of transverse water-circulating pipes, each set leading from a mud-drum on one side to the opposite steam-drum on the opposite side, connecting-pipes for connecting the ends of the mud-drums with each other, a superheated steam-dome, steam-pipes for connecting the said steam-drums with the said dome, return water-pipes leading from said steam-dome to the said connecting-pipes, a shell for inclosing the said drumsand pipes at the sides, ends and roof, longitudinal defleeting-plates projecting from the sides of the shell to the beginning of the crossing of the Water-circulating pipes, and longitudinal deflecting-plates extending between the roof of the shell and the sides of the steam-dome, substantially as shown and described.

1l. Aboilerconiprisingspacedmud-drums, spaced steam-drums above the mud-drums, sets of transverse water-circulating pipes, each set leading from a mud-drum on one side to the opposite steam-drum on the opposite side, the sets of Water-circulating pipes passing each other above the longitudinal plane of the mud-drums and below that of the steam-dru rns,transverse connectingpipes for connecting the ends of the mud-drums with each other, connectingpipes for the ends of the steam-drums, and sets of longitudinal watercirculatin g pipes, each set leading from the muddrum-connecting pipe at one end of the boiler under the crossing of the transverse water-circulating pipes, to then open into the steam-drum-connecting pipe at the other end of the boiler, substantially as shown and described. l

TOM FRENCH. Witnesses:

R. L. MELCHER, JOHN A. FRENCH. 

